Re: [PATCH v11 5/5] Documentation: document the preferred tag checking mode feature
From: Catalin Marinas <catalin.marinas@arm.com>
Date: 2021-07-28 17:40:38
On Wed, Jul 28, 2021 at 08:11:00AM +0200, Greg Kroah-Hartman wrote:
On Tue, Jul 27, 2021 at 01:52:59PM -0700, Peter Collingbourne wrote:quoted
diff --git a/Documentation/ABI/testing/sysfs-devices-system-cpu b/Documentation/ABI/testing/sysfs-devices-system-cpu index 160b10c029c0..5f87b146deb9 100644 --- a/Documentation/ABI/testing/sysfs-devices-system-cpu +++ b/Documentation/ABI/testing/sysfs-devices-system-cpu@@ -640,3 +640,21 @@ Description: SPURR ticks for cpuX when it was idle. This sysfs interface exposes the number of SPURR ticks for cpuX when it was idle. + +What: /sys/devices/system/cpu/cpuX/mte_tcf_preferred +Date: July 2021 +Contact: Linux ARM Kernel Mailing list <linux-arm-kernel@lists.infradead.org> +Description: Preferred MTE tag checking mode + + When a user program specifies more than one MTE tag checking + mode, this sysfs node is used to specify which mode should + be preferred when running on that CPU. Possible values: + + ================ ============================================== + "sync" Prefer synchronous mode + "async" Prefer asynchronous mode + ================ ============================================== + + Changes to this sysfs node may not take effect immediately.Ok, so when do they take effect? A hint would be nice :)
I'll go with Will suggestion below and remove this line altogether (it takes effect when scheduling a task on a CPU): https://lore.kernel.org/r/20210714115018.GE31686@willie-the-truck (local) -- Catalin _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel